Frustrating TWRP Issue

Hey, so today I wanted to install a new ROM on my SM-N900 Note 3. I flashed TWRP, and rebooted. Then I booted into TWRP and opened Android File transfer on my Mac. It kept saying please connect USB device. Other parts of the system do not read the device, however TWRP says the device is charging from my Mac's USB port. I moved to my Windows computer and connected the device. Still nothing. I tried multiple USB cables both 2.0 and 3.0. Nothing works! Can someone help me? I have no OS installed! I don't want to use ODIN or download mode because I would prefer to the install the ROM I'm trying to install because it seems silly that I have recovery access but can't access the file transfer.
Thanks, Justin